At last, 5G wireless is here... sort of, but not really. As promised, AT&T has launched its unofficial 5G network, starting with certain parts of Austin. So long as you have a Galaxy S8 or S8 Plus, you can get speeds that should leave regular LTE in the dust. Expect downloads about twice as fast on average, the carrier says. Indianapolis is due for the next rollout in the summer, and there will be 20 total areas covered (including Atlanta, Boston, Chicago, Los Angeles, Nashville and San Francisco) by the end of 2017. And if you're not inclined to Samsung hardware, you should see "numerous other devices" this year that take advantage of the new network.